<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
  </head>

  <body>
    <div id="app"></div>
    <!-- 1.引入依赖 -->
    <script src="../react/react.development.js"></script>
    <script src="../react/react-dom.development.js"></script>
    <script src="../react/babel.min.js"></script>
    <!-- 2.开始开发 -->
    <script type="text/babel">
      // JSX的本质: babel会将JSX转换为React.createElement
      // JSX -> Babel -> React.createElement
      let message1 = <h2>JSX</h2>
      let message2 = React.createElement('h2', null, 'React.createElement')
      console.log(message1)
      console.log(message2)

      ReactDOM.render(message1, document.getElementById('app'))
    </script>
  </body>
</html>
